proper timing vs appropriate timing

Some examples from the web:

• My thinking on the proper timing and strategy for implementation is what's changed.
• All measures set out in point 3 should be accompanied by monitoring of the presence of Diabrotica to identify the need and proper timing for protective actions.
• Recalls its demand to avoid pro-cyclical policies; stresses the importance of undertaking structural and tax reforms and simultaneously underlines that due attention should be paid to their proper timing;
• Proper timing was never my fault.
• Recalls its demand to avoid pro-cyclical policies; stresses the importance of undertaking structural and tax reforms and simultaneously underlines that due attention should be paid to their proper timing;
• For the procurement aspects, it is proposed to apply Community rules and criteria ensuring fair competition with proper balance aiming at timing and efficient results.
• The OBD system shall monitor the following elements of the Variable Valve Timing (VVT) System on engines so-equipped for proper operation:

Some examples from the web:

• Commissioner Chris PATTEN, responsible for external relations, underlined the appropriate timing for such a debate.
• An appropriate timing would be one year after the Member States have reported on their findings of priority substances in sediments and biota.
• In the case of the proposed world fund, appropriate timing is not in evidence.
• After consulting the Member States, the Commission shall decide on the appropriate timing for the publication of subsequent calls for interest.
• As to the establishment of diplomatic relations between the European Community and the DPRK, the Commission is considering the appropriate timing of such a step in close coordination with Member States.
• Similarly the level of communications and appropriate timing has renewed the connection between share owners and boards of directors, allowing questions to be put without the 'nuisance effect' which could jeopardise effective management of shareholder meetings.
• Regarding the appropriate timing of the monetary policy exit, central banks will in essence balance risks to price stability and risks to financial stability.
• Three months would seem to be appropriate timing time for the Commission to draw up a proposal for a decision on the refusal, or restriction, of authorisation.
• Commissioner Chris PATTEN, responsible for external relations, underlined the appropriate timing for such a debate.
• Mr President, Commissioner, I too should like to highlight the appropriate timing of this debate in the context of the Third United Nations Conference on Least Developed Countries, which is now being held in Brussels.
• EBA shall develop draft regulatory technical standards to specify the conditions according to which competent authorities shall determine the appropriate nature and timing of the sequential roll out of the IRB Approach across exposure classes referred to in paragraph 3.
• The German Presidency drove forward the appropriate legal measures with impeccable timing.
• The timing of this proposal is therefore fully appropriate for farmers... .
• I find your timing less than appropriate.
• The timing of Parliament's report is very appropriate.
• It is thought more appropriate to leave issues to do with timing to the lead committee.
• As the honourable Member said, the timing of the report is extremely appropriate.
• It also establishes appropriate channels for data reporting including defining timing and regularity of data reports.
• AIFMs should therefore apply appropriate policies and procedures which allow them to prevent malpractices such as market timing or late trading.
• The renewed interest in nuclear power expressed by a number of Member States, with the perspective of numerous life extensions and construction of new plants, makes the timing of this revised proposal particularly appropriate.